http://www.ebay.co.uk/itm/Exustar-Stainless-Steel-Pedal-Toe-Clip-Double-Leather-Toe-Straps-Bike-Cycle-/380684275079
Those will make your feet feel much more secure than single straps, and are much less likely to snap
I find leather ones tend to stretch and a harder to get to secure round your foot after that happens.
@fredtc started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
http://www.ebay.co.uk/itm/Exustar-Stainless-Steel-Pedal-Toe-Clip-Double-Leather-Toe-Straps-Bike-Cycle-/380684275079
Those will make your feet feel much more secure than single straps, and are much less likely to snap