These blankets are waterproof with no back seam and breathable. Constructed with 300 grams of fill and a stronger than 1200 denier 600 denier material with threads that are more tightly woven than most 1200 denier blankets available on the market today. The shoulder gussets were moved forward and cut up higher to allow more freedom of shoulder movement which helps to prevent and eliminate shoulder rub. This special sale is offered while supplies last. Available in most sizes. Please call with your size. Also available in medium weight by request. Regularly $149.99. Visa, MasterCard, Discover and debit cards accepted.