The bag is made from a combination of materials to ensure maximum performance. The Purist bag for the Minimalist, The shell is made from PointZero, It has a special treatment to the fabrics face to give it a degree of water repellency and also extra stain resistance.

The synthetic insulation is a Primaloft One to give the best warmth to weight ratio available on the market, OMM have used different weights per panel to ensure the best technical usage of the fill.

The base sheet is filled with Primaloft One 40g, Whilst Primaloft One 60g is on the top sheet. The footbox is also shaped and filled with Primaloft One 60g to keep the feet warm.

The construction is also considered as a loose laid outer shell and the inner stitched through to the insulation again this is to maximise insulative value and eliminate cold spots.