Add to basket, Sealy Advantage Upton Mattress, Regular/Firmer Tension, SingleSealy Advantage Upton Mattress, Regular/Firmer Tension, Single£649.00Product review details, this product has received, on average, 4.80 out of 5 star rating.There are 10 reviewsCompareSelect for product comparison, Sealy Advantage Upton Mattress, Regular/Firmer Tension, SingleOnline only | Exclusive to John Lewis