Fast shipping and GREAT product! These trousers are Great!  The waist has an elastic portion so wearing these with thicker shirts shouldn't be a problem.  the 34 length is perfect for a 6' ft tall person.  The pockets on these trousers are fantastic!  There are functional compartments within the very roomy pockets.  I particularly like the smaller wallet pockets in the rear pockets.  This particular model is a heavy canvas type material that feel VERY durable, but may be a little heavy for hot weather.  I wore them in 102 (F) degree heat with 97 percent humidity and was fine.  However I will try the lighter version as well.  Overall a great pair of field trousers/ range pants.