Price Match GuaranteeBackcountry.com

Men's Underwear & Baselayers

149 Results
Refine Results
Sort

Sort

Relevancy% OffTop SellersSortMore
Relevancy% OffTop SellersLowest PriceHighest PriceHighest Rated
close

Filters

Sizes

XSSMLXLXXL

Gender

male
Stoic Merino Performance Boxer Brief - Men's
60% Off
(20)

StoicMerino Performance Boxer Brief - Men's

$19.98 $49.95
  • gray
  • black
Smartwool Merino 150 Long-Sleeve Baselayer - Men's
30% Off
(5)

SmartwoolMerino 150 Long-Sleeve Baselayer - Men's

$56.00 $80.00
  • black
  • blue
CW-X Insulator Stabilyx Tight - Men's
55% Off
(16)

CW-XInsulator Stabilyx Tight - Men's

from $56.23 $129.95
    Saxx Vibe Boxer Brief - Men's
    50% Off
    (95)

    SaxxVibe Boxer Brief - Men's

    from $15.97 $31.95
    • black
    • blue
    Patagonia Capilene Midweight Bottoms - Men's
    50% Off
    (26)

    PatagoniaCapilene Midweight Bottoms - Men's

    $29.50 $59.00
    • black
    • gray
    • blue
    Marmot Reactor Fleece Pant - Men's
    30% Off
    (11)

    MarmotReactor Fleece Pant - Men's

    $55.26 $78.95
      Stoic Casual Underwear - 3-Pack - Men's
      60% Off
      (4)

      StoicCasual Underwear - 3-Pack - Men's

      $15.98 $39.95
        Icebreaker Bodyfit Anatomica Zone Long Boxer - Men's
        30% Off
        (3)

        IcebreakerBodyfit Anatomica Zone Long Boxer - Men's

        $45.50 $65.00
          Saxx Ultra Boxer Brief with Fly - Men's
          55% Off
          (28)

          SaxxUltra Boxer Brief with Fly - Men's

          from $14.38 $31.95
          • black
          • gray
          Smartwool Merino 250 Baselayer Pattern Crew - Men's
          30% Off
          (7)

          SmartwoolMerino 250 Baselayer Pattern Crew - Men's

          $73.50 $105.00
          • gray
          • black
          • blue
          • more
          Smartwool Merino 150 Pattern Long-Sleeve Baselayer - Men's
          35% Off

          SmartwoolMerino 150 Pattern Long-Sleeve Baselayer - Men's

          from $52.00 $80.00
          • brown
          • orange
          • gray
          • green
          • red
          CW-X Endurance Generator Tights - Men's
          50% Off
          (4)

          CW-XEndurance Generator Tights - Men's

          $84.97 $169.95
            Smartwool NTS Mid 250 Pattern Zip Top - Men's
            45% Off
            (10)

            SmartwoolNTS Mid 250 Pattern Zip Top - Men's

            from $60.50 $110.00
            • blue
            • green
            • brown
            • gray
            • red
            • black
            • more
            Icebreaker Everyday Leggings With Fly - Men's
            36% Off

            IcebreakerEveryday Leggings With Fly - Men's

            $45.00 $70.00
            • black
            • gray
            Layer 8 Innov8 Boxer Brief - 3-Pack - Men's
            75% Off

            Layer 8Innov8 Boxer Brief - 3-Pack - Men's

            from $9.99 $40.00
            • blue
            • green
            Outdoor Research Pentane Tight - Men's
            50% Off
            (3)

            Outdoor ResearchPentane Tight - Men's

            $44.97 $89.95
            • gray
            • black
            Stoic Cotton Stretch Boxers 2-Pack - Men's
            50% Off
            (12)

            StoicCotton Stretch Boxers 2-Pack - Men's

            $12.47 $24.95
              Stoic Performance Stretch Boxer Brief 3-Pack - Men's
              65% Off
              (37)

              StoicPerformance Stretch Boxer Brief 3-Pack - Men's

              $13.98 $39.95
              • black
              • green
              KAVU One Der Suit - Men's
              55% Off
              (3)

              KAVUOne Der Suit - Men's

              $44.98 $99.95
                Smartwool Merino 150 Printed Boxer Brief - Men's
                30% Off
                (2)

                SmartwoolMerino 150 Printed Boxer Brief - Men's

                $33.60 $48.00
                • red
                • green
                • blue
                Marmot Neothermo 1/2-Zip Fleece Top - Men's
                45% Off
                (6)

                MarmotNeothermo 1/2-Zip Fleece Top - Men's

                from $60.47 $109.95
                • black
                • gray
                • blue
                CW-X Stabilyx Vented Under Tight - Men's
                50% Off

                CW-XStabilyx Vented Under Tight - Men's

                $74.97 $149.95
                  Mountain Equipment Eclipse Zip Top - Men's
                  55% Off

                  Mountain EquipmentEclipse Zip Top - Men's

                  $56.23 $124.95
                    Stoic Merino Lightweight Bottom - Men's
                    50% Off
                    (22)

                    StoicMerino Lightweight Bottom - Men's

                    $34.97 $69.95
                    • gray
                    • black
                    Saxx Fuse Boxer Brief - Men's
                    50% Off
                    (4)

                    SaxxFuse Boxer Brief - Men's

                    $15.97 $31.95
                      Duckworth Maverick T-Shirt - Men's
                      11% Off
                      (3)

                      DuckworthMaverick T-Shirt - Men's

                      $79.95 $89.95
                      • black
                      • green
                      ExOfficio Sol Cool Boxer Brief - Men's
                      23% Off
                      (1)

                      ExOfficioSol Cool Boxer Brief - Men's

                      from $29.06 $37.95
                      • black
                      • blue
                      Stance Combed Cotton Wholester Boxer Brief - Men's
                      35% Off
                      (6)

                      StanceCombed Cotton Wholester Boxer Brief - Men's

                      $19.47 $29.95
                        Marmot Neothermo Hooded Top - Men's
                        30% Off
                        (3)

                        MarmotNeothermo Hooded Top - Men's

                        $87.46 $124.95
                        • red
                        • blue
                        CW-X Stabilyx Ventilator Short - Men's
                        55% Off
                        (16)

                        CW-XStabilyx Ventilator Short - Men's

                        $35.98 $79.95
                          Tahari Performance Brief - 2-Pack - Men's
                          74% Off

                          TahariPerformance Brief - 2-Pack - Men's

                          from $4.99 $19.50
                          • blue
                          • black
                          • red
                          • more
                          ExOfficio Sol Cool Print Boxer Brief - Men's
                          52% Off
                          (1)

                          ExOfficioSol Cool Print Boxer Brief - Men's

                          $20.33 $41.95
                            CW-X Endurance Pro Shorts - Men's
                            55% Off
                            (1)

                            CW-XEndurance Pro Shorts - Men's

                            $35.98 $79.95
                              Marmot Folsom Reversible Long-Sleeve Top - Men's
                              55% Off
                              (1)

                              MarmotFolsom Reversible Long-Sleeve Top - Men's

                              from $29.23 $64.95
                              • red
                              • green
                              Dakota Grizzly Lowell Pant - Men's
                              30% Off
                              (1)

                              Dakota GrizzlyLowell Pant - Men's

                              $34.18 $48.83
                              • black
                              • blue
                              Layer 8 Solid Performance Boxer Brief - 3-Pack - Men's
                              82% Off

                              Layer 8Solid Performance Boxer Brief - 3-Pack - Men's

                              $7.65 $42.50
                                Quiksilver Packable Knit Top - Men's
                                20% Off

                                QuiksilverPackable Knit Top - Men's

                                $36.00 $45.00
                                  UGG Brunswick Robe - Men's
                                  30% Off

                                  UGGBrunswick Robe - Men's

                                  $101.46 $144.95
                                    Smartwool Merino 250 Baselayer Crew - Men's
                                    30% Off
                                    (35)

                                    SmartwoolMerino 250 Baselayer Crew - Men's

                                    $66.50 $95.00
                                    • black
                                    • blue
                                    • brown
                                    • red
                                    • more
                                    Under Armour Base 4.0 Legging - Men's
                                    29% Off
                                    (11)

                                    Under ArmourBase 4.0 Legging - Men's

                                    $60.76 $84.99

                                      Show

                                      Page

                                      Hike & Camp Gear 60% off or More
                                      Items Under $10