| 摘要 |
A floatation device, particularly a floatation device for children that can be easily worn, easily positioned, effective in operation, and sufficiently innocuous in appearance comprises an self-inflating tube that is worn around the neck, lies relative flat against the wearer, and nets under and against the chin when inflated, without pressing tightly against the neck as would restrict breathing. The uninflated device may be plain or decorated and should respond to direct contact with water by inflating within no more than one minute of contact with water, and preferably in less than 15 seconds of contact with water. The device should not inflate nor generate gas when contacted with 85 DEG C and 98 % relative humidity for 15 minutes.
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