Polysleep is a Canadian bed-in-a-box mattress company and manufacturer that specializes in advanced, locally-produced memory foam. Polysleep is a vertically integrated sleep brand, headquartered and manufactured in Montreal, Quebec. This means they control their entire production line, formulating and pouring their own specialized anti-microbial foam recipes in-house. Antimicrobial Foam Their own open cell foam formulation is a medical grade hygienic barrier and is popular with allergy sufferers. The mattresses have a unique high-density foam support frame incorporated into the perimeter of the mattress to prevent sagging when sitting on the edge. Their compressed shipping process has none of the heavy chemical off-gassing smell of other imported bed-in-a-box options.