Sauer's practical underwear is made of Polartec, a modern, extremely breathable, body-hugging bi-elastic four-way stretch fabric. These garments are extremely comfortable to wear. With a thickness of 1.1 mm, the material complies with ISSF regulations. The fabric is double-layered (2.2 mm) at the elbows to provide padding in the prone and kneeling positions. The composition of this material minimises the risk of a throbbing pulse caused by the shooting sling in the kneeling and prone position. The Polartec fabric fits snugly, keeps the skin dry during physical exertion, is windproof and abrasion resistant.
The elbows of the shirt are double-layered to provide better padding. The inside elbows feature a thin stretch fabric to prevent material bunching. A full-length zip fastener makes it easy to put the shirt on.
This thermal waistcoat is the counterpart to the Thermo Shirt. It is identical in terms of material and workmanship. Unlike the shirt, however, it is sleeveless and has a zip fastener along the whole length. Because it is highly breathable, this waistcoat is ideally suitable for wearing under the shooting jacket.