The International School of Boston is the first site in the United States to feature synthetic turf with an all-natural infill material.

School first in USA to install "green" synthetic turf

CAMBRIDGE, MA—While synthetic turf has become popular as a low-maintenance recreational surface across the U.S., its rubber infill is coming under increased scrutiny by some who see it as a health hazard because of the high temperatures that it generates and the potentially hazardous materials it contains, including lead and other carcinogens.  The International School of Boston ( is the first site in the United States to feature synthetic turf with an all-natural infill material, and school officials believe their new field will be a model for schools, sports leagues, and public recreation departments across the country.

The new surface, supplied by New York-based Geo Safe Play ( and developed in Italy where it is used on professional soccer fields, produces far less rainwater runoff because it is natural and absorbs water, says the manufacturer. Because it contains no rubber, surface temperatures approximate those of grass and produce far fewer injuries.

The infill, which goes underneath and inside the blades of synthetic grass, is derived from coconut shells and cork.

“The International School of Boston, in designing its new play area, made it clear they did not want to settle for a typical surface,” said Jonathan Austin, Principal of Austin Architects, which developed the school’s master plan and designed the new play area in collaboration with Ray Dunetz Landscape Architecture. “The parents, board, and administration, through its Green Committee, pushed to find a natural infill material that would provide improved safety, including reduced incidence of burns, heat exhaustion, and injuries, and would comply with an environmental resolution passed by the school’s board.  We quickly concluded there was nothing currently being used in the U.S. that would meet that mandate.”

Austin’s team identified the new product and then conducted a rigorous review with the school’s Green Committee to ensure the product was the right fit for the school’s needs.

“When it comes to designing and constructing new spaces for our school, or for that matter any project, doing it the ‘easy way’ is seldom the same as doing it the ‘right way,’” said John Larner, Head of School. “Concerned parents working through our committee structure said, ‘we want our kids to have the best field possible, with the fewest injuries, and the project must be environmentally sustainable.’”

“We are proud to be able to introduce these advanced systems, developed and manufactured by Limonta Sport and used in Italy for almost a decade, to the American market,” said Domenic Carapella, Managing Director for Geo Safe Play, the exclusive North American distributor of the natural infill material.  “This is a natural looking, lead-free synthetic turf that looks and feels great in the summer and winter, under snow or shade, with a totally natural infill material that retains humidity, contains no harmful metals or chemicals and adds no heat to the system. This is a win-win for our children and for the synthetic turf industry.”

While the natural infill product costs approximately 10 percent more than a field made with rubber infill, the school sees the safe and “green” field as a major selling point for prospective students and their parents.

“Parents and students want exceptional academics, but they also want the best – and in this case, the safest – facilities for their children,” added Larner.  “We have transformed a dirt field that was never capable of growing grass into a lush play area for students of all ages.  Our community is incredibly impressed”

In addition to Austin Architects and Ray Dunetz Landscape Architecture, which are both members of the United States Green Building Council, the project team includes landscape construction firm Emanouil Brothers, Inc. and civil engineers Samiotes Consultants, Inc.