REI Co-op Midweight Long Underwear Bottoms - Kids'
This product is not available. Good news: we have a newer version.
Designed to keep them warm while wicking away moisture, the kids' REI midweight long underwear bottoms are the ideal base layer for highly aerobic cold-weather fun like skiing, hiking and snowshoeing.
Shop newer version- Durable yet soft polyester/spandex blend fabric wicks moisture and dries quickly
- Mineral-based LAVA™ finish keeps fabric odor-free
- Flatseam construction, low-profile waistband and crotch gusset keep you comfortable as you move
- UPF 50 sun protection
- Fly opening
- Fitted
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
| Best Use | Multisport |
|---|---|
| Fabric | 89% polyester/11% spandex |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50 |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Underwear Weight | Midweight |
| Gender | Girls' Boys' |
| Sustainability | From a Climate Label Certified brand |
REI Co-op Clothing - Girls'
| XXS (4-5) Kids | XS (6-7) Kids | S (8) Kids | M (10-12) Kids | L (14-16) Kids | XL (18) Kids | |
|---|---|---|---|---|---|---|
| Numerical Size | 4 - 5 | 6 - 7 | 8 | 10 - 12 | 14 - 16 | 18 |
| Height Range | 41 - 44 | 46.5 - 50.5 | 52.5 | 55 - 58 | 61 - 62.5 | 62.5 |
| Chest | 22 - 23 | 24 - 26 | 27 | 28.5 - 30 | 31.5 - 33.5 | 35.5 |
| Waist | 22 - 22.5 | 23 - 23.5 | 24.5 | 25 - 26 | 28 - 30 | 32 |
| Hip | 23 - 24 | 24 - 27.5 | 28.5 | 30 - 32 | 34 - 36 | 38 |
| Inseam | 17 - 18.75 | 20 - 23 | 24.5 | 26 - 27.5 | 29 - 29.5 | 29.5 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated. Size chart values represent body measurements, not garment measurements.
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
