REI Co-op Midweight Crew Base Layer Top - Toddlers'
Make your tot's base layer this warm, breathable REI Co-op Midweight Crew long underwear top and they'll play happily outside all day. It's great on its own for inside play, too.
- Made of a durable yet soft polyester/spandex blend fabric that wicks sweat and dries fast
- Odor control treatment regenerates between launderings
- Flatseam construction, raglan sleeves and side gussets are comfortable as you move
- Extended back hem stays tucked in when you lean forward
- Envelope head opening allows for easy on-off
- UPF 50 sun protection
- Contains materials that meet the bluesign® criteria
- 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
Imported.
View all REI Co-op Kids' Base Layer TopsBest Use | Multisport |
---|---|
Shirt Type | T-shirt |
Fabric | 89% polyester/11% spandex (bluesign approved) |
Sun-Protective Fabric | Yes |
UPF Rating | 50 |
Moisture Wicking | Yes |
Quick Drying | Yes |
Underwear Weight | Midweight |
Sleeve Length | Long Sleeve |
Gender | Toddlers' |
Sustainability | Contains materials that meet the bluesign® criteria From a Climate Label Certified brand |
0-3 MO | 3-6 MO | 6-12 MO | 12-18 MO | 18-24 MO | 2 T | 3 T | 4 T | |
---|---|---|---|---|---|---|---|---|
Height Range | 24 | 27 | 30.5 | 33 | 35 | 35 | 38 | 41 |
Weight Range | 10-15 lbs. | 15-20 lbs. | 20-25 lbs. | 25-28 lbs. | 28-32 lbs. | 28-32 lbs. | 32-35 lbs. | 35-40 lbs. |
Chest | 17 | 18 | 19 | 19.75 | 20.5 | 20.5 | 21 | 22 |
Sleeve Length | 12 | 13 | 14.5 | 15.5 | 17.5 | 17.5 | 18.5 | 19.75 |
Waist | 17.5 | 18.5 | 19.5 | 20.25 | 21.5 | 21.5 | 22 | 22.5 |
Hip | 17.5 | 18.5 | 19.5 | 20.25 | 21 | 21 | 21.5 | 22 |
Inseam | 8.5 | 10 | 12 | 13.5 | 14 | 14 | 15.5 | 17 |
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.

