Kaneyvok Pectus Excavatum Orthosis Brace, Sternal Depression Support, Thoracic Depression Brace, Sunken Sternum Brace (Medium)

Terrible. The plastic window isn't properly glued to the silicone so it completely leaks air and the silicone is cheap super soft (not dense) silicone so it can't support suction counter-pressure. I bought a similar looking vacuum bell from another brand/seller and it's been excellent, and I thought I was ordering from the same brand but accidently ordered from this seller/brand and it's completely useless and defective.

This pectus excavatum correction brace is well-designed, and the small size fits perfectly. It provides noticeable support without being uncomfortable. The soft, breathable material makes it comfortable even in the summer. After prolonged use, my chest concavity has improved, and the results are very satisfying.