This 140-inch 4-seater boneless sofa features premium velvet fabric and 32D high-density sponge. Built with tufted appearance, ergonomic anti-slip base, it supports flexible modular combination and requires no assembly for multiple daily scenarios.PREMIUM ULTRA-SOFT VELVET: Luxurious velvet upholstery delivers cloud-like relaxation and enhances interior home aesthetic appeal.32D HIGH DENSITY SPONGE: High rebound foam provides lasting support, not easy to deform after long-term sitting use.FLEXIBLE MODULAR COMBINATION: Independent sofa units can be freely matched to fit various home layout and space demands.ERGONOMIC & ANTI-SLIP BASE: Scientific bottom design fits human body curves and avoids sliding for stable placement.RETRO TUFTED DESIGN: Exquisite tufted craft creates elegant retro style suitable for living room and home theater.NO ASSEMBLY NEEDED: Unpack and use directly, sponge rebounds naturally without tedious installation steps.After opening the compression bag (Note: do not cut with a knife, so as not to damage the product), if there are wrinkles around the cushion corners, you need to wait for about 72 hours. It is recommended that you pat and knead the corners of the sofa to help the foam recover better.If you need any help, please take a picture and contact the seller. Product Type: 140 Inch 4-Seater Boneless Modular Sectional SofaMain Material: Premium Soft Velvet FabricFilling Material: 32D High Density Fast Rebound SpongeDesign Feature: Tufted Craft, Ergonomic Bottom, Anti-Slip StructureApplicable Scene: Living Room, Home Theater, Apartment Leisure AreaInstallation: No Assembly Required