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REI Midweight MTS Long Underwear Bottoms - Kids'

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Soft and comfortable, the MTS midweight long underwear bottoms from REI are lightly brushed on the inside with a spun polyester on the outside for an excellent warmth-to-weight ratio.

  • 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


Item 786129

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REI Midweight MTS Long Underwear Bottoms - Kids' Specs
Best use
Polyester / polyester blend
94% polyester/6% Lycra spandex
25 inches
Fabric type
Sun-protective fabric
Moisture wicking
Quick drying
Underwear weight
Inseam (in.)

REI Midweight MTS Long Underwear Bottoms - Kids'

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REI Midweight MTS Long Underwear Bottoms - Kids'is rated5.0out of5by3.
Rated5out of5byfromNice multi-use pantsMy son uses these to run in, hike in, sleep in, and backpack in. They are warm, but not to warm, and because of the design, they function just as well as running tights in cool weather as they do as sleepwear on the Appalachian Trail. Bottom line is...he likes them a lot and wears them constantly. Another really nice REI only item.
Date published: 2013-10-20
Rated5out of5byfromMust have if you want to keep warm!At 120 lbs, 4'11" (and reading the other reviews)went with the recommedation and purchased XL top and bottom. The shirt and pants were too long and exchanged the set at an REI store. To my surprise the "S" was the perfect fit and bought 2 more other sets. The new size fits snug (as I wanted) and the shirt's length, sleeves and pants were all perfect! I use them under dress pants and sweater and I'm comfortable throughout the day. This will be part of my layering on my coming trip to Alaska!
Date published: 2013-03-24
Rated5out of5byfromdries fastWhile driving up to go sledding, my daughter spilled water on these. I was dismayed, but we were able to dry them out holding them in front of the car heater vent for 5 minutes. She was very happy.
Date published: 2012-12-01

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