Editor's Personal Pick — This is our editor's base layer.
Matt's base layer: 100% merino in a slim fit.
Why we picked this
Matt Gehrmann wears Icebreaker's Merino 200 Oasis Long Sleeve Crewe as his base layer.
Quick specs
| Category | Clothing |
| Brand | Icebreaker |
| Fabric | 100% merino wool, 18.9 micron |
| Warmth | 200 (Icebreaker's rating) |
| Weight | 217 g (men's medium) |
| Fit | Slim |
| Construction | Gusseted underarms, offset shoulder seams, flatlock seams, drop-tail hem |
| Price | $120 at Icebreaker (checked Oct. 22, 2026) |
| Worn by | Matt Gehrmann |
| Editor's verdict | Matt's base layer. |
The full review
The Oasis Long Sleeve Crewe is 100% merino in an 18.9-micron fiber, in a slim fit, with gusseted underarms, offset shoulder seams, flatlock seams and a drop-tail hem, according to its product page. A men's medium weighs 217 g.
Offset shoulder seams move the seam off the top of the shoulder, where a strap vest's harness sits, and the drop-tail hem stays tucked in when you bend over.
What we love
- Matt's base layer.
- 100% merino.
- Offset shoulder seams, out from under the vest straps.
- A drop-tail hem that stays tucked.
What to know before you buy
- Slim fit, so check the size chart if you layer over it.
- $120.
- XS and XXXL were unavailable when we checked.
Where to buy
- Icebreaker Merino 200 Oasis Long Sleeve Crewe (brand-direct)
California Upland doesn't earn a commission on these links.
See also
- All clothing
- Icebreaker Merino 200 Oasis Beanie — what Matt wears when it's cold
- Darn Tough Hunter Mid-Calf Cushion Sock — Matt's socks