Eco-friendly certified infill

The TERRA® products, designed to grant maximum playing comfort and environmental safety, are certified according to the most stringent environmental regulations.




Thanks to TERRA® XPS, the technical characteristics of the artificial turf pitch remain stable over time. Its special formulation offers improved resistance against external agents like UV rays, ozone and weathering. TERRA® granules maintain their characteristic elasticity and softness for many years after installation, and showed good wear resistance even after intense UV irradiation.

TERRA® XPS is certified according to the Dutch Soil Quality Decree (Besluit Bodemkwaliteit) which sets severe rules and tight controls on building materials in order to prevent the pollution of soil and water.

SO.F.TER. is currently the only infill supplier that has obtained such a certification after that the whole production cycle has been inspected by INTRON Certification Institute on behalf of the Dutch Government.




TERRA XPS INDOOR Indoor EN 13501-1:2002 – Class Cfl
(European fire classification of construction products and building elements)
NEN 1775:1997 – Class T1
(Fire propagation of floorings, NL)
Halogen free, flame retardant product, offering a high level of protection against flame propagation
TERRA XPS ≤ 130 kLangley / year FIFA Quality Concept
Dutch Soil Quality Decree
EU Directive EN 71-3 (safety of toys)
Highly ecological product with excellent technical properties


Common features

The entire range of SO.F.TER. infill granules has been designed to deliver a performance as similar as possible to that of natural turf. All our products are realized using special Thermoplastic Elastomers compounds (TPE), and comply with the most stringent regulations in terms of health, environment and sport performance. Our products differ from the other infill materials for their unique array of benefits:

Because of their premium technical performance and guaranteed level of environmental safety, our products are present in many installations, certified according to the severe standards of:

  • - FIFA Quality Concept
  • - Dutch Soil Quality Decree
  • - Regolamento LND 2008 (Italian Amateur Soccer League)


It should be noted that the overall performance of an artificial system is not determined by the infill alone but depends also on other elements such as the synthetic turf and the elastic shock pad underlay, if present.


Technical features

The SO.F.TER. product portfolio includes two types of infill materials: the Holo® products featuring the innovative cylindrical shape with a hollow space inside, and the Terra® and Forgrin® products with the traditional solid, anti-compaction, cylindrical shape.


Shape Cylindrical, hollow inside Cylindrical Cylindrical
Bulk density, g/cm3 (1) 0.55 0.85 0.85
Infill quantity, kg/m2 (2) 5.0 7.7 7.7
Granule to infill 1 football pitch, kg (3) 35,700 54,978 54,978
Shock absorption: (4)      
- New 66% 63% 63%
- After 20,000 Lisport cycles 65% 62% 62%
Typical shock absorption of natural turf    63-67%  

All above figures show the typical values for an artificial system with a shock pad underlay, e.g.: 12 mm shock pad, 45 mm turf system with 15 mm infill sand and 10 mm performance infill.
(1) Density: the ratio of the mass of a body and its volume. The bulk density of a material is calculated in a way similar to absolute density but takes into consideration the total volume occupied by the solid, including the hollow spaces (solids with closed cavities, open cavities or spongy structures).
(2) The kg/m2 data indicate the quantity of granules needed to obtain 10mm infill height per square meter.
(3) Data for the infill of a field of standard dimensions (105x68 m = 7,140 m2) for a 10 mm high infill layer. 
(4) Data measured according to the FIFA Quality Concept method.