Warmth:Brushed component for extra warmth. Raised collar with press studs. Longline cutAdjustable:Cuff that can be folded or unfolded for 2 years of use.Softness:Knitted with extremely soft thread for extra comfort and softness.Ecodesign:We have reduced environmental impact by dyeing the thread before weaving it.Easy dressing:3 press studs at the shoulder to open the collar to pass baby's head through.Freedom of movement:Stretch component for superior comfort and freedom of movement.Moisture management:Slightly breathable base layer. Low perspiration wicking. How to dress your babies so they stay warm on your sledging outings?: To make sure you stay warm and dry, we recommend using the 3-technical-layer rule: - Layer 1 or thermal base layer, to stay dry. - Layer 2 or an insulating layer, to keep the heat in.- Layer 3 against bad weather. What are the benefits of polyester?: High-quality component, whose warmth and lightweight properties have been rigorously tested in the laboratory and in the field. The knit has been brushed to provide the volume needed to create a layer of air that keeps your kid's body temperature warm. What is the cut of the SIMPLE WARM kids' thermal ski base layer?: The cut of the SIMPLE WARM baby ski/sledge technical base layer (or first layer) is REGULAR. This is a classic straight cut in a stretch knit fabric that fits the body shape of every baby. The neck is well covered thanks to the high collar.