Can I use the Outbreaker Daypack as a carry on?
Yes. Most airlines allow luggages up to 45 linear inches (length + width + depth) or 22 x 14 x 9". The Outbreaker Daypack easily meets those guidelines and those of stricter budget and European airlines at 17 x 11 x 6.5".
Remember to check your airline's carry on guidelines before flying.