The SM309 hybrid pocket spring mattress features a refined, structured design anchored by a light grey textured mugwort-infused knit top surface, finished with secure quilted tufting and crisp dark green piped edge trim. Its ventilated olive woven polyester side border incorporates evenly spaced perforations to support consistent air flow, while the neat box-edge construction creates a clean, tailored silhouette that aligns seamlessly with standard bed frame profiles. Built for long-term resilience, the mattress layers a perforated 75% natural latex comfort pad over transitional high-density polyurethane foam wrapped along the perimeter to reinforce edges, paired with formaldehyde-free 3E coconut coir panels on both sides of a high-carbon steel individually pocketed spring core. Layers are bonded with low-VOC water-based adhesive, and reinforced plastic tufting buttons hold the quilted top layers firmly in place to prevent shifting over time. The construction delivers a medium-firm 6/10 feel on the latex-padded side, with a firmer feel on the coir-padded reverse. Functional details support versatile, comfortable use: dual usable surfaces let users select between softer latex contouring and firmer coir support, while the integrated ventilation system combines perforated latex, breathable knit fabric, and side border perforations to dissipate heat and moisture. Perimeter foam encasement prevents edge sag when sitting on bed sides, zoned spring tension paired with the coir layer reduces lumbar pressure for back sleepers, and individually wrapped coils eliminate spring squeak while minimizing motion transfer between sleepers. The mugwort-infused top fabric offers mild deodorizing, skin-friendly properties suitable for sensitive users, and non-standard dimensions are available upon request to fit custom bed frames. This mattress fits a wide range of spaces: the queen size variant is well-suited for residential master bedrooms serving adult couples, while the firmer coir side delivers stable spinal support appropriate for children’s and elder bedrooms. Its durable standard sizing works for long-term rental apartment fit-outs, its commercial-grade core and breathable fabric suit mid-range hotel guest rooms, and its smaller twin and full size variants fit student and staff dormitory beds. The 220mm thickness provides ample cushioning for rigid slatted or solid platform bed bases. For procurement, note that each set is delivered across multiple cartons, with assembly taking a defined period per unit. Available sizes cover twin, full, and queen dimensions, with custom sizing accessible for project-specific needs. The fabric is engineered to withstand regular contact over extended use, with defined load capacities per sleeper and overall static load limits to guide specification for high-traffic or multi-user settings.