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This product is no longer available, but don't go just yet.


  • MTS® (Moisture Transport System) fabric wicks away moisture and dries quickly
  • Lycra® spandex helps garment stretch
  • Fabric provides UPF 50+ protection from harmful solar rays
  • Flat seams eliminate bulk; rib-knit ankle cuffs help seal out cold


View all REI Kids' Long Underwear Bottoms

REI membership


Best Use Multisport
Fabric 94% polyester/6% spandex
Sun-Protective Fabric Yes
Moisture Wicking Yes
Quick Drying Yes
Underwear Weight Midweight
Inseam (in.) 11 inches
Gender Toddlers'