I have just added these to my existing pairs as I have had them a good while and they have kept their shape and are still as comfortable as the day I bought them. They are hard wearing, I only ever wear work or walking boots and wellies and cover lots of miles. Excellent product.
Haven't tried it in field yet but have been wearing rovince trousers, socks, shirt,fleece for last 12 months and no ticks worth every penny 40” chest medium tops