I have a pet peeve about Velcro secured sandals.  While Velcro is a terrific material for lashing things together and works well for sizing a sandal to fit, I think the final securing piece should be a buckle.  Once you've sized the straps to suit your foot, you use a quick release buckle so that your sandal is always on the ready to fit properly and thus avoiding the dreaded Velcro "rip" sound.  But it's obvious that some production costs are saved by going with full Velcro, and thus why you see a majority of sandals without buckles these days.

STRAPS:

--PRO's
* Buckle for quick secure/release
* Double layered, with firm waterproof outer and soft neoprene inner layers
* 3 adjustable points

--CON's
* Front strap has annoying strap loop position, with questionable shape to inner padding
* Buckle is a bit thin in design--could be sturdier
* Inner neoprene layer feels thin, leaving question of durability

This particular style of Teva sandal comes with a Velcro and buckle secured strap system.  It has ample sizing ranges and works pretty well.  The strap quality is decent.  The outer layer is a waterproof matte material and the the inner lining is made of a soft thin neoprene layer.  There is one thing I'd consider a design flaw, though.  The front strap has a loop point attached to the inside strap anchor, that has a strap liner ending directly over the big toe knuckle (rather than in the gap between toes).  You can see what I'm talking about in the second and last photos provided with the product details.  Well, the strap pad has a tendency to fold over as you slide your foot underneath the strap.  If you don't notice it at first, you certainly will when you start walking.  But even once you have the strap liner positioned properly, there is a chance for rubbing of the padding edge against your toe, directly on top of the knuckle.  It happened to do this with both my feet.  The only way I could get it not to do this was to loosen the strap... but it ended up being too loose in the front.  When I secured it back, I felt the rubbing again.  Other sandal makers haven't made this mistake.  The loop is either just a little further inward (see&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Clarks-Men-s-Biofix2-Sandal/dp/B005HGJKYE/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Clarks Men's Biofix2 Sandal</a>), or placed directly in the middle (see&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Clarks-Men-s-Switcher-Sandal/dp/B005HGJKYO/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Clarks Men's Switcher Sandal</a>).

SOLE:

--PRO's
* High grip tread, with slightly smoother outer edge and semi "tacky" inner material
* Top side has very soft spongy material with attractive "stone wall" pattern

--CON's
* Tread is a bit noisy on smooth surfaces at first, but should diminish as tread "breaks in".
* Tread design looks a bit prone to attracting and holding dirt/debris.
* Top side spongy material protrudes up and outward at the toe, making it prone to scrapes when walking on hard surfaces.

The top of the sole is made of a super soft cushioning sponge-like rubberized material.  It feels very nice and soft against the foot, which is terrific, except that it rather exposed at the front edge of the sandals.  I can easily see it coming into contact with abrasive hard surfaces and getting chewed up over time.  This will probably vary depending upon your walking style and where you walk.  But otherwise, it's a very comfortable feeling sole.  There is a "cushion puck" under the heel, but it's a little small.  I don't think it contributes very much to reducing shock, yet it's probably not needed anyway.  The sole does a good job of cushioning.

The bottom of the sole is seriously grippy, due to its innovative "spider" design.  The outer edge of the sole is firm and slightly smooth with some tread grooves, and the inner sole has the "spider" pattern with a mix of hard bits extending from a semi-sticky ridged surface.  It seems to work well, although all of the "nooks & crannies" may act as a debris magnet on sandy or very soft ground.

WEIGHT:
These sandals are very lightweight, probably lighter than average for a sandal of this class.  But, it's weighted enough not to feel unsubstantial.  If there's one unquestionable strong point I can make for these sandals, is that Teva got the weight just perfect.

OVERALL:
These are generally comfortable and serviceable sports sandals that will do well in a variety of conditions, including wet.  I also appreciate the fact that it uses a buckle (instead of Velcro) for taking on/off.  But, the front strap problem I cited earlier in the review was too much of a problem for me.  I ended up deciding to return these.  Quite frankly, I'd have given 4.5 stars for this sandal if it weren't for this drawback.  Now, it may be that for other foot types, maybe those with a smaller big toe, that this design might not be a problem.  Also, it could be the kind of thing that will "work itself out" over time.  But for the price bracket on these sandals and my wish to own a pair of sandals that will feel sufficiently comfortable from the start, these weren't going to cut it.