The standard design neck seal found on most drysuits offers a {10in | 252mm} mounting diameter at the base, three different latex thickness options, and a variety of choices for neck sizing – see sizing chart below. As a general rule, the seal opening should be trimmed to be no smaller than 80% (i.e. maximum of 20% less) than your actual measurement of the relaxed neck circumference, tighter than that could cut off blood flow to your brain.
Latex Thickness Options:
- Standard (GD): 0.7mm to 1.0mm – Usual thickness found on most seals
- Heavy Duty (HD): 1.0mm to 1.4mm – Thicker, thus more durable, but less comfortable
Neck Seal Size Chart |
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| Standard Bellow Neck Seal – 10\\” Mounting diameter (standard) | |||||
| Item # | Size | Quality | Neck Circumference /Diameter | Fits** | Thickness |
|---|---|---|---|---|---|
| GD-N1-S | Small | Standard | 9.15\\” / 2.91\\” | 10\\”-12.5\\” | 0.7-1.0mm |
| GD-N1-M | Medium | Standard | 10.5\\” / 3.34\\” | 12\\”-14.5\\” | 0.7-1.0mm |
| GD-N1-L | Large | Standard | 11.9\\” / 3.79\\” | 14\\”-16.5\\” | 0.7-1.0mm |
| GD-N1-XL | X-Large | Standard | 13.5\\” | 16\\”-19\\” | 0.7-1.0mm |
| HD-N1-S | Small | Heavy Duty | 9.15\\” / 2.91\\” | 9.5\\”-11.5\\” | 1.0-1.4mm |
| HD-N1-M | Medium | Heavy Duty | 10.5\\” / 3.34\\” | 11\\”-13\\” | 1.0-1.4mm |
| HD-N1-L | Large | Heavy Duty | 11.9\\” / 3.79\\” | 12.5\\”-14.5\\” | 1.0-1.4mm |
| HD-N1-XL | X-Large | Heavy Duty | 13.5\\” / 4.30\\” | 14.5\\”-17\\” | 1.0-1.4mm |
