Hybrid 6 Inches Twin XL Mattress in Box Sized 38X80 with Pocket Coil Support and High Density Foam Designed for Medium Firm Comfort Perfect for People Looking Forward to a Comfortable Sleep Every Night Crafted with High Density Comfort Foam and Pocket Coil Hybrid Support this Medium Firm Mattress is Ideal for Adults, Teens, Kids and Guests Offering Durable Structure and Breathable Polyester Cover for Long Lasting Use Tight Euro Top Design Enhances Pressure Relief and Stability while Polyester Cover Promotes Air Circulation Keeping the Sleeping Surface Cool and Comfortable Through the Night Enjoy Restful Nights and Quality Family Time on a Medium Firm Twin XL Mattress Offering Supportive Sleep for Back, Side and Stomach Positions with Motion Isolation and Even Weight Distribution Mattress Expands to Full Shape Within 48 to 72 Hours After Unboxing with Proper Rotation and Supportive Bed Frame Recommended for Long Term Comfort and Durability