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 |
|||||
| 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 |
