Here's what other sites are saying:
The one piece you won't take off until the mission is complete: The baselayer top is engineered with minimal seaming and deliver targeted warmth for superior comfort and mobility in the harshest alpine environments. Part of the Summit Series collection- the world's finest alpine equipment.
- The North Face refers to the men's version
The North Face Summit Series Men's L1 Top is the base layer for cold, harsh alpine climbs. The form Fitting top stays close to the body, Thermolite fabric ready to add heat while wicking moisture. You stay comfortable and whenever you start to heat up, open the 1/2 zip to release the excess. Minimal seams to get in your way, so you move naturally, even under layers of clothing. The system works together, but it all starts at 1. Features of the The North Face Summit Series Men's L1 Top Thermolite? polyester/elastane for warmth and moisture management Minimal seaming Form Fit Half-zip for ventilation Engineered knit fabric provides zonal warmth and moisture management with minimal seaming Merrow-stitch construction provides a more accurate andreliable stitch while eliminating bulk and improving comfort Engineered fabric and articulated patterning designed specifically for alpine comfort and mobility
- Moosejaw refers to the men's version
The one piece you wonG??t take off until the mission is complete: The North Face Summit L1 Top. This baselayer top is engineered with minimal seaming and delivers targeted warmth for superior comfort and mobility in the harshest alpine environments. Part
- Mountain Gear refers to the men's version
What do you use most on a month-long expedition' You probably think about your tent, sleeping bag, kitchen gear, shells, puffy jackets, and fleece midlayers, but odds are good that you're wearing your baselayers 24 hours a day, and nothing is more important than that first insulating, moisture-wicking layer. The North Face's totally redesigned Summit Series has you covered from head to toe and from inside to out, starting with the new Summit L1 Men's Baselayer Top. Keeping you dry is a baselayer's most important job, and the L1's blend of nylon and polyester pulls moisture away from your skin before you even know it's there, so you don't have to worry about sweat building up and getting cold when you stop moving. It's cut to stay close to your skin for improved moisture management, and The North Face engineered it with articulated patterning for easy movement when you're traveling through the alpine or figuring out big-wall beta. Low-bulk Merrow stitching won't chafe your skin, and the 1/2-length zipper allows for easy ventilation and is backed by a draft-blocking flap to keep cold air at bay.
- Backcountry.com refers to the men's version
Designed as a first layer for alpine endeavors, the Summit L1 base layer top keeps you warm and comfortable from day one until your adventure is complete.
- REI refers to the men's version